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Re: Don't agree (archive)

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Posted by Kit Wetzler on September 18, 2000 at 15:34:08:

In Reply to: Don't agree posted by Luxo M3 on September 17, 2000 at 20:19:46:

15hp for adjustable cams? Ask him to see that power on an OBD2 car [ha, ha, ha]. If what he said was true about software, wouldn't using cams to affect intake/exhaust mix affect the mixture and also make case for detonation necessitating hte need for the engine management system to retune the engine?

No. Not adjustable cams. Dick at Dynospot is talking about using a reground cam, which has higher lift and duration than the stock cams. The problem with OBD-II cars is that the BMWs have very aggressive knock sensor programs. With the software, according to Dick at Dynospot and others I've spoken to, ping heavily and make power for a run or two, and quickly get the timing retarded enough to make more like stock power, without pinging.

Dick feels that the hydraulic lifters would be enough to make up for the reground cam profiles, such that shims wouldn't be necessary. Sounds interesting to me. I suspect that he'd have to get custom software written for the cams, depending on how well the ECU can compensate for higher MAF readings.

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